Study of improvement of bioremediation performance for the degradation of petroleum hydrocarbons in oily sludge by a chemical pretreatment strategy
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The outcome of different processes in oil refineries is production of hazardous wastes containing toxic and hardly degradable compounds. Use of chemical processes before bioremediation for faster degradation of heavy and hardly biodegradable compounds can be a solution to enhance the degradability of oily sludge. Thus, the aim of the present study is to investigate the efficiency by ozone oxidant in enhancing the degradability of TPH in oily sludge. The design of experiments of ozonation process was under different conditions with the one-factor-at-a-time approach. The concentration of the oily hydrocarbons was determined using gravimetric method. The results indicated that the optimal conditions for TPH removal by ozonation process involved pH = 11, within 4 h with ozone concentration of 10 mg/min, which output an efficiency of 23.8%. Results showed the TPH degradation by ozonation process was well fitted to pseudo-first-order kinetic model with determination coefficient of more than 97%. This study indicated that chemical treatment alone cannot guarantee the treatment of TPH under typical conditions. However, reducing the amount of compounds with higher molecular weight and predominating compounds with lower carbon content is an effective option to enhance the degradability of compounds with high molecular weight as a pretreatment for biological processes.
Ozonation process was tested for TPH degradation in oily sludge.
The Gravimetric method was used to determine the concentration of TPH and Iatroscan TLC-FID was used for SARA analysis.
The GC-FID was used to determine the PHCs fraction analysis.
The ozonation process is an effective method for increasing the degradability of TPH in oily sludge.
The TPH degradation was more consistent with the ozonation process with a coefficient of more than 97% with pseudo first order reactions.
KeywordsOily sludge Total petroleum hydrocarbons Chemical pretreatment SARA analysis
The authors would like to gratefully appreciate Iran University of Medical Sciences for financial support (Grant No. 95-03-27-29464).
- 7.EPA S. Environmentally acceptable resources recovery from oil refinery sludge. US Environmental Protection Agency (EPA), Washington DC. 1991Google Scholar
- 12.Ying-Xin G, Ran D, Xing C, Zhao-Bo G, Yu Z, Min Y (2018) Ultrasonic washing for oily sludge treatment in pilot scale. Ultrasonics 90(3):1–4Google Scholar
- 13.Naddafi K, Nabizadeh R, Jonidi JA, Yaghmaeian K, Koulivand A (2014) Efficiency of chemical oxidation of composted sludge of crude oil using hydrogen peroxide and Fenton. Arak Med Univ J 16(81):75–86Google Scholar
- 19.Peters KE, Peters KE, Walters CC, Moldowan J (2005) The biomarker guide. Cambridge university press, CambridgeGoogle Scholar
- 21.Guangji Hu, Li J, Guangming Z (2013) Recent development in the treatment of oily sludge from petroleum industry: a review. Int J Chem Sci 261(4):470–490Google Scholar
- 28.Farzadkia M, Ghorbanian M, Biglari H, Gholami M, Mehrizi EA (2018) Application of the central composite design to optimization of petroleum hydrocarbons removal from oilfield water using advanced oxidation process. Arch Environ Prot 44(4):20–30Google Scholar
- 29.Adeniji A, Okoh O, Okoh A (2017) Analytical methods for the determination of the distribution of total petroleum hydrocarbons in the water and sediment of aquatic systems: a review. J ChemGoogle Scholar
- 30.Association APH, Association AWW, Federation WPC, Federation WE (1915) Standard methods for the examination of water and wastewater: American Public Health AssociationGoogle Scholar
- 31.EPA, California Environmental Protection Agency (2006) California petroleum refinery hazardous waste source assessment report. Department of Toxic Substances Control. Office of Pollution Prevention and Technology DevelopmentGoogle Scholar
- 32.Reynolds VR, Heuer SR (1993) Process for the recovery of oil from waste oil sludges. Google PatentsGoogle Scholar
- 40.Mishra S, Lal B, Jyot J, Rajan S, Khanna S, Kuhad RC (1999) Field study: in situ bioremediation of oily sludge contaminated land using” Oilzapper”. Hazard Ind Wastes 31:177–186Google Scholar
- 53.Judd S, Jefferson B (2003) Membranes for industrial wastewater recovery and re-use. Elsevier, AmsterdamGoogle Scholar
- 54.Aghapour AA, Moussavi SG, Yaghmaeian K (2015) Application of ozone for, THE removal of catechol fromaquatic environment. J Urmia Univ Med Sci 26(7):561–570Google Scholar
- 56.TEPA (Taiwan Environmental Protection Administration) (2003) A research on the determination of the TPHs pollution levels in soil. Technical Report, TaiwanGoogle Scholar